package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /*
     * 新增菜品，同时保存对应口味数据
     * */
    @Override
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishId = dishDto.getId();//菜品id

        /*for (DishFlavor flavor : dishDto.getFlavors()) {
            flavor.setDishId(dishId);
        }*/
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /*
    * 根据id查询菜品和对应口味信息
    * */
    @Override
    public DishDto getByIdWithFlavor(Long id){
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /*
    * 修改菜品信息
    * */
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        /*flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());*/
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishDto.getId());
        }

        dishFlavorService.saveBatch(flavors);
    }

    /*
    * 批量删除
    * */
    @Override
    public void remove(List<Long> ids) {

        //select count(*) from setmeal where id in (1,2,3) and status = 1
        //查询菜品状态，确定是否可用删除
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.in(Dish::getId,ids);
        queryWrapper.eq(Dish::getStatus,1);

        int count = this.count(queryWrapper);
        if(count > 0){
            //如果不能删除，抛出一个业务异常
            throw new CustomException("当前选择有菜品为起售状态，不能删除");
        }

        //如果可以删除，删除菜品表中的数据---Dish
        this.removeByIds(ids);

        /*for (Long id : ids) {
            if (this.getById(id).getStatus() == 1){
                throw new CustomException("当前选择有菜品为起售状态，不能删除");//已经关联菜品，抛出一个业务异常
            }
        }
        //正常删除分类
        for (Long id : ids) {
            this.removeById(id);
        }
*/
    }
}
